X-16 is located under Yantar Plant, a place typically full of zombified stalkers. That is because X-16 housed a project dedicated to psionic research and as a testing ground for the Brain Scorcher (more powerful psi-emitter completely covering the path to the center of the Zone). On the screenshot - the core of that psi-influence.
Also shooting that brain with .50 cal (to be more precise, "Kord" machine gun) does nothing. The glass won't hold a grenade launcher though.
Comments 2
Martind Forlon
it must be cool when from such dark places pops up stalker ...
Ajay
Not as cool since only zombies live in this place. While they can't aim, there's no range like point blank range. But yeah, these labs are both creepy and awesome.